1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Fix Astronomy Chapter 10

2. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 1 How have we been able to construct detailed maps of the features on Venus? A. By studying Venus from Earth with powerful telescopes. B. By studying the surface with powerful telescopes on the spacecraft orbiting Venus. C. By making computer models of geological processes on Venus. D. By using radar from a spacecraft that was sent to orbit Venus. E. By landing spacecraft on the surface for close-up study.

3. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 2 Which of the following worlds has the least (lowest pressure) atmosphere? A. Mercury B. Venus C. Earth

4. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 3 Which of the following best describes rain on Venus? A. It does not have rain. B. It is composed of sulfuric acid. C. It is composed of carbonic acid. D. It is composed of methane. E. It is composed of water.

5. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 4 Which of the following worlds has the most substantial (most dense) atmosphere? A. Mercury B. Venus C. Moon D. Earth

6. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 5 Mercury has a weak magnetic field that is still strong enough to deflect the incoming solar wind. A. True B. False

7. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 6 How hot does Mercury's surface get during its "day"? A. 300 K B. 400 K C. 500 K D. 600 K E. 700 K

8. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 7 The average surface temperature and atmospheric pressure on Venus are _______________ and ________________, respectively. A. 1000 K and 10 atmospheres B. 300 K and 92 atmospheres C. 280 K and 1 atmosphere D. 730 K and 92 atmospheres E. 730 K and 0.1 atmospheres

9. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 8 Radar mapping indicates that there is a complete absence of craters that are less than 3 km in diameter on the surface of Venus. Mapping also shows that there are few craters smaller than 25 km in diameter on the surface of Venus. What causes this effect on Venus? A. Radar is not that accurate. There could be craters present and we don't know it. B. Since Mercury has a magnetic field, it blocks meteoroids from hitting Venus. C. Since Venus is closer to the Sun than Earth, there are not a lot of small meteoroids present to hit the surface. D. The high temperature causes small meteoroids to burn up and not hit the surface. E. The thick atmosphere causes small meteoroids to burn up and not hit the surface.

10. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 9 The Earth has a surface temperature of 300 K. The wavelength at which the Earth is brightest is 10 microns. The dayside of Mercury is brightest at 4 microns. Which of the following is closest to the temperature on the dayside of Mercury? A. 400 K B. 120 K C. 750 K D. 300 K

11. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Question 10 Which of the following explanations best accounts for the high density of the planet Mercury? A. Its material is compressed by high internal pressures. B. It contains a large fraction of iron and other metal. C. It has a large range of surface temperatures. D. It has a large gravity which compresses its surface layers.

12. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1. D2. A3. B4. B 5. A6. A7. D8. E 9. C10. B